Mike OBrien said:
It was not possible to perform this exploit with an unmodified game client. Those who performed it knew exactly what they were doing.
As a normal player of the game, you shouldn’t have to worry that you might get banned for doing something that you didn’t think was wrong. We know it’s a very serious action to ban an account, and we don’t want to take that action arbitrarily or subjectively. Our goal is to only ban when we’re sure that the account maliciously participated in the exploit, or was used for muling or distributing the proceeds.
In this case we made a mistake and banned some unrelated accounts. It was human error, and we apologize. We unbanned most of them in a batch last night. But, upon reviewing appeals, we can see that we missed some, so we’re going through and unbanning those too.
We review appeals thoroughly. Anyone who believes he or she was unfairly banned only has to write to us to get a clear answer.
Hopefully this answered everyone's questions.